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Across 7. refers to heat sources within the planet 10. is a roughly circular mound-shaped protrusion resulting from the slow eruption of felsic lava (usually rhyolite and/or dacite) from a volcano 13. one of the school colors 14. School mascot 15. Creator of this Crossword 16. is the extended perimeter of each continent and associated coastal plain 17. are natural conduits through which lava travels beneath the surface of a lava flow, expelled by a volcano during an eruption. 19. so named for their broad, shield-like profiles, are formed by the eruption of low-viscosity lavas that can flow a great distance from a vent, but not generally explode catastrophically 22. is an area of frequent earthquakes and volcanic eruptions encircling the basin of the Pacific Ocean 23. Teacher of Sixth Grade Science Class 24. is the study of volcanoes, lava, magma, and related geological phenomena 28. are waves that travel through the Earth, most often as the result of a tectonic earthquake, sometimes from an explosion. 30. School Principle 33. occur when rising magma makes contact with ground or surface water 36. is molten rock that sometimes forms beneath the surface of the Earth 37. is an opening, or rupture, in a planet's surface or crust, which allows hot, molten rock, ash, and gases to escape from below the surface 39. bits of pulverized rock and glass created by volcanic eruptions 43. What volcanoes sprew 45. refers to the movement of the Earth's continents relative to each other 46. is the outermost solid shell of a planet 47. is a depressed block of land bordered by parallel faults 49. is another Greek term from Seism - "the shakes" and Graphos - "I draw 51. is the popular term for a large volcano that usually has a large caldera and can potentially produce devastation on an enormous, sometimes continental, scale. 52. is an igneous, volcanic rock with a high iron content 55. is the result of a sudden release of energy in the Earth's crust that creates seismic waves 56. is a series of waves created when a body of water, such as an ocean, is rapidly displaced. 57. is a textural term for a volcanic rock that is a solidified frothy lava 58. is an earthquake that occurs after a previous earthquake 59. The month we are in

Down 1. is an active volcano in the Hawaiʻian Islands 2. is a broad, low relief crater that is caused by a phreatic eruption or explosion caused by groundwater contact with hot lava or magma 3. is a theory of geology that has been developed to explain the observed evidence for large scale motions of the Earth's lithosphere. 4. occur where two plates slide towards each other commonly forming either a subduction zone (if one plate moves underneath the other) or a continental collision (if the two plates contain continental crust). 5. is an underwater mountain range, formed by plate tectonics 6. Color of a school bus 8. occur where plates slide or, perhaps more accurately, grind past each other along transform faults 9. Holiday on March 23, 2008 11. result from eruptions that erupt mostly small pieces of scoria and pyroclastics (both resemble cinders, hence the name of this volcano type) that build up around the vent. 12. The month John was born in 13. interior of the Earth 18. is a volcanic feature formed by the collapse of land following a volcanic eruption. 20. occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge 21. two plates move apart from each other and the space that this creates is filled with new crustal material sourced from molten magma that forms below 25. is a conspicuous landform and feature of many volcanoes 26. The city the school is located 27. is a volcano which is not currently active 29. is a large underground pool of molten rock lying under the surface of the earth's crust 31. is the point on the Earth's surface that is directly above the hypocenter or focus, the point where an earthquake or other underground explosion originates. 32. is a chain of volcanic islands or mountains formed by plate tectonics as an oceanic tectonic plate subducts under another tectonic plate and produces magma. 34. scale, assigns a single number to quantify the amount of seismic energy released by an earthquake 35. are tall conical mountains composed of lava flows and other ejecta in alternate layers, the strata that give rise to the name. 38. The state Mount Saint Helens is located 40. The mountain range Mount St. Helens is located in 41. is the solid outermost shell of a rocky planet 42. is a planar rock fracture, which shows evidence of relative movement 44. is a lake that forms in a volcanic crater, caldera, or maar 48. built by slow eruptions of highly viscous lavas 50. s an igneous, volcanic rock, of intermediate composition, with aphanitic to porphyritic texture 53. What vocanoes do 54. is air-fall material produced by a volcanic eruption regardless of composition or fragment size